When moisture ceases to bridge the contacts, the relay opens, and the lid-closing circuit is completed. The lid closes ... However, to conserve recorder chart paper, the mode switch has been electronically tied to the precipitation sensor through a reset relay. This allows the meter to be ... This system is basically made of the clock and pen-arm assembly from an FW-1 water-level recorder. The pen arm isanbsp;...
|Title||:||A precipitation collector and automated pH-monitoring system|
|Author||:||Gerald M. Aubertin, Benjamin C. Thorner, John Campbell, Northeastern Forest Experiment Station (Radnor, Pa.)|